Comping Gen

generator/acoustic.py

@@ -146,3 +146,10 @@ def validate_comping(document: dict) -> None:
   events.sort()
   if any(a[1] > b[0] for a, b in zip(events, events[1:])):
     raise ValueError('acoustic bass and upper must release together or remain separate')
+  cursor = fractions.Fraction()
+  for measure in document['staves'][0]['measures']:
+    length = generator.model.fraction(measure['duration'])
+    first = next((event for event in events if cursor <= event[0] < cursor + length), None)
+    if first and 'bass' not in groups[first]:
+      raise ValueError(f'measure {measure["number"]}: first acoustic attack must include bass')
+    cursor += length